B11EC Code: Meaning, Causes, and Symptoms | OBD2 Codes
B11EC – Rear HVAC Blower Control Input Circuit Short
B11EC Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B11EC Possible Causes
Faulty Rear HVAC Blower Control,Rear HVAC Blower Control harness is open or shorted,Rear HVAC Blower Control circuit poor electrical connection,Faulty Heating, Ventilation, and Air-Conditioning (HVAC) Module
Under normal operation, the rear auxiliary control is supplied a 5-volt reference and ground from the Heating, Ventilation, and Air-Conditioning (HVAC) Module. When the auxiliary blower motor speed, airflow mode or temperature control is adjusted, the HVAC module reads the voltage from the rear auxiliary climate controls on the auxiliary blower motor speed, airflow mode, and temperature control feedback circuits to determine the requested setting. The OBDII code sets when the HVAC module senses an open, or short to ground or voltage on the rear auxiliary climate controls airflow mode input circuit.